jgallen23 -
You can sync over the internet if you first establish a VPN connection to the network where the desktop PC you want to sync with is connected.
If you just want to sync over WiFi with a direct network connection (Axim and desktop PC both connected to same LAN) then you can do that by simply entering the machine name or IP address of the desktop PC you want to sync with.
See this tutorial for more info:
http://www.aximsite.com/modules.php?...rticle&artid=3